Metal brake-beam.



J. R. ONDERDONK.

METAL'BRAKE BEAM.

APPLICATION FILED DEC. 2. 190a. RENEWED MAR. 16, 1906.

Fay-41 PATENTED MAY 29, 1906.

ANDREW. a. GRANAM c0. PNDYD-LITHUGRAPNER5. wnsuma'ron. n. c.

UNITED" STATES PATENT @FFTUE.

METAL BRAKE-BEAM.

Specification of Letters Patent.

Eatented May 29, 1906.

Application filed December 2,1908. Renewed March 16, 1906. Serial No. 306,885.

To all whom it may concern:

Be it known that 1, JOHN REMsEN ON- DERDONK, a citizen of the United States, residing in Baltimore, Maryland, have invented certain Improvements in Metal Brake- Bcams, of which the following is a specification.

The object of my invention is to construct a trussed brake-beam which, considering the amount of metal contained therein, is strong and rigid, an object which I attain as hereinafter set forth, reference being had to the accompanying drawings, in which- Figure 1 is a top or plan view of a brake beam constructed in accordance with my invention, one of the brake-shoe heads being removed from one end of the beam in order to illustrate the structure of the latter. Fig. 2 is an enlarged section on the line a a, Fig. 1. Fig. 3 is an enlarged section on the line b b, Fig. 1. Fig. 4 is a view illustrating a m0dification in the construction of part of the beam. Fig. 5 is a view illustrating a modified form of beam and brakehead for use therewith, and Fig. 6 is a view showing a slightly-modifled construction of the end portion of the brake-beam.

The beam proper consists of two rolled shapes 1 and 2, these shapes being preferably T-bars and the bar 1 being of larger size and heavier cross-section than the bar 2. The bar 1 has straight and parallel opposite ends, but is slightly bowed or bent between these ends, as shown in Fig. 1, and the bar 2 longitudinally envelops said bar 1, the webs of the bars being in edgewise contact with each other at the back of the beam and the web of the bar 2 lying against the ends of the bar 1 at the ends of the beam and against the flanges of said bar 1 throughout the straight end portions of the front of the beam.

By preference the edge of the web of the bar 1 is grooved, as shown in Figs. 2 and 3, for the reception of the edge of the web of the bar 2, thus serving in a measure to prevent transverse displacement of said bar 2.

The central portion of the front member of the bar 2 is spread apart from the bar 1 by means of an interposed strut 3, which bears upon said bar 2 at the central portion of the same and is longitudinally divided in that portion of its length which receives the central portion of the beam 1 and its back beam 2, the separated member 8* of this portion of the strut being united to the main member by means of transverse bolts, rivets, or other fastenings, as clearly shown in Fig. 3, or, if desired, the strut may be made in two parts throughout, secured together both at the back and the front of the beam, this latter construction, so far as regards the front end of the strut, being illustrated in Fig. 4.

The strut 3 has the usual slot 4 therein for the reception of the brake-lever, and the opposite ends of the beam carry the brakeheads 5, of any desired construction, the spaces between the flanges of the bars 1 and 2 at the ends of the beam being filled in by means of blocks 6 of any suitable material, so as to afford a proper bearing for the brakeshoe heads, the latter, as well as the fillingblocks, being firmly secured to the opposite ends of the beam by suitably-disposed bolts or rivets.

If desired, the beam may be connected to the brake-head by the use of a bayonet-joint construction, as shown in Fig. 5, the brakehead 5 being provided with a substantially circular opening for the reception of the end of the brake-beam. In this beam the flanges of the bars 1 and 2 are back to back at the rear of the beam, and the flange of the bar 2 bears upon the web of the bar 1 at the front of the beam, the webs of the bar 2 entering notches 9 in-the brakehead, which is then turned to its normal position, as shown in. Fig. 5, the ends of the webs of the bar 2 passing through grooves 10 in the head, as shown by dotted lines in said figure.

The ends of the enveloping member 2 of the beam are welded or otherwise suitably united together at any suitable point-for in stance, at the point 7so that said bar 2 is practically a continuous bar and serves to stiffen and strengthen the bar 1. The compression member of the truss is formed by the bar 1 and the rear member of the bar 2, and the tension member of the truss is formed by the spread or separated front member of said bar 2.

If desired, the beam may be composed of bars presenting only straight lines instead of being partly straight and partly curved, one end of such a beam being illustrated in Fig. 6.

Having thus described my invention, I claim and desire to secure by Letters Patent 1. A brake-beam consisting of a pair of rolled shapes one longitudinally enveloping the other and in contact with the back of the same, substantially as described.

2. A brake-beam consisting of a pair of IIO rolled shapes one enveloping the other and in contact with the back of the same but having its front member separated therefrom at the center of the beam by an interposed strut, so as to form a truss, substantially as specified.

3. A brakebeam consisting of a pair of longitudinal T-bars, one longitudinally enveloping the other and in contact with the back of the same, substantially as specified.

4. A brake-beam consisting of a pair of longitudinal T-bars one longitudinally enveloping the otherand in contact with the back of the same, the front member of said enveloping bar being centrally separated from the main bar by means of an interposed strut, substantially as specified.

5. A brake-beam consisting of a pair of T bars one longitudinally enveloping the other and in contact with the back of the same, the Webs of the two bars abutting edge to edge, on Ithe back of the beam, substantially as speci- '1ed.

6. A brake-beam consisting of a pair of T- bars one longitudinally enveloping the other, the webs of the two bars abutting edge to edge, on the back of the beam, and the edge of the web of one bar being grooved for the reception of the other, substantially as specified.

7. A brake-beam consisting of apair of T- bars one longitudinally enveloping the other, the webs of the two bars abutting, edge to edge, on the back of the beam and the front member of the enveloping bar being centrally separated from the main bar by means pf 3n interposed strut, substantially as speci- "1e 8. A brake-beam consisting of a pair of T- bars one longitudinally enveloping the other, the webs of the two bars abutting, edge to edge, on the back of the beam and the front member of the enveloping bar being centrally separated from the main bar by means of an interposed strut, the edge of the web of one bar being grooved for the reception of the other, substantially as specified.

9. A brake-beam consisting of two rolled shapes, one of smaller cross-section than the other, the smaller member longitudinally enveloping the other and in contact'with the back of the same, substantially as specified.

10. A brake-beam consisting of two rolled shapes, one of smaller cross-section than the other, the smaller member longitudinally enveloping the other and in contact with the back of the same, but having its central front portion separated therefrom by means of an interposed strut, substantially as specified.

11. A brake-beam consisting of a pair of T- bars, one of smaller cross-section than the other, the smaller bar longitudinally enveloping the larger bar and in contact with the back of the same, substantially as specified.

12. A brake-beam consisting of a pair of T-bars, one of smaller cross-section than the other, the smaller bar longitudinally enveloping the larger bar and in contact with the back of the same and having its central front portion separated therefrom by means of an interposed strut, substantially as specified.

13. A brake-beam consisting of a pair of T-bars one of smaller cross-section than the other, and longitudinally enveloping the larger bar, the webs of the bars abutting, edge to edge, on the back of the beam, substantially as specified.

14. A brake-beam consisting of a pair of T-bars one of smaller cross-section than the other, and longitudinally enveloping the larger bar, the webs of the. bars abutting, edge to edge, on the back of the beam, and the edge of-the web of the larger bar being grooved for the reception of that of the smaller bar, subtantially as specified.

15. A brake-beam consisting of a pair of T-bars one of smaller cross-section than the other, and longitudinally enveloping said larger bar, the webs of the bars abutting, edge to edge, on the back of the beam but the front member of the enveloping bar being separated from the main bar by means ofan interposed strut, substantially as specified.

16. A brake-beam consisting of a pair of T-bars one of smaller cross-section than the other, and longitudinally enveloping said larger bar, the webs of the bars abutting, edge to edge, on the back of the beam but the front member of the enveloping bar being separated from the main bar by means of an interposed strut, the edge of the web of the larger bar being grooved for the reception of that of the smaller bar, substantially as specifie 17. A brake-beam consisting of a pair of rolled shapes, one longitudinally enveloping the other but having its front member separated therefrom by means of an interposed strut, the latter having a longitudinally-divided portion for the reception of the main bar of the beam, substantially as specified.

18. A brake-beam consisting of a pair of rolled shapes one longitudinally enveloping the other but having its front member separated therefrom by means of an interposed strut, the latter having a longitudinally-divided portion for the reception of the main bar of the beam, but having a single portion providing a bearing for the separated front member, substantially as specified.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

J. REMSEN ONDERDONK.

Witnesses:

' FELIX R. SULLIVAN,

LoUIs A. KATZENBERGE TOO 

